Oil pump



Nov. 24, 1931.

3/ (929.1. :i is 44/9 55 u f6 a 55 w. D. OGLETREE OIL PUMP Filed Sept. 4,1926

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2 Sheets-Sheet l nim LIL UJU Patented Nov. 24, 1931 UNITED STATES WILLIAM D. OGLETREE, F TULSA, OKLAHOMA OIL PUMP Application filed September 4, 1926. Serial No. 133,583.

My invention relates to new and useful improvements in pumps and more particularly to an oil pump, the principal object of the invention residing in the provision of aconstruction whereby the pump, as a unitary structure, may be inserted into the well or Withdrawn therefrom.

Another object of the invention resides in the construction of a pump in which the plunger operates between upper and lower valve controlled heads, the plunger itself having valve controlled passages therethrough, so that when the unitary structure is inserted into the well all the valves will be automatically opened and when the structure is withdrawn from the well the valves controlling the heads will be mechanically operated or operated by movement of the plunger and plunger rod.

A further object of the invention resides in the provision of novel forms of packing carried by the unitary pump structure and adapted to engage the inner wall or surface of the well casing when the unitary structure has reached its lowermost position.

With the above and other objects in View, which will appear as the description proceeds, my invention consists in the novel details of construction, and arrangement of parts, described in the following specification and illustrated in the accompanying' drawings, and while I have illustrated and described the preferred embodiments of the invention, as they now appear to me, it will be understood that such changes may be made as will fall within the scope of the appended claims.

In the drawings:

Fig. 1 is a transverse vertical section through the pump and casing with parts shown in elevation.

lFig. 2 is a side elevation.

Fig. 3 is a horizontal section on the line 3-3 of Fig. 1 looking in the direction of the arrows.

Fig. 4 is a fragmental detail, in vertical section with parts shown in elevation, illustrating the lower packing construction.

Fig. 5 is a fragmental detail in vertical section, with parts shown in elevation, of the plunger construction, and

Fig. 6 is a fragmental detail in vertical section, with parts shown in elevation, of the 5 upper packing.

In the drawings 1 indicates the well casing in which the unitary pump structure is adapted to be positioned. The unitary pump structure consists of the pump barrel or tubing 2 which is interiorly threaded at 9 and the upper end of the barrel or tubing 2 is threaded onto the eXteriorly threaded head 3 having the passages 4 therethrough and the lower end of the barrel or tubing is threaded onto the exteriorly threaded head 5 having the passages 6 therethrough. The passages 4 of the upper head 3 are controlled by the valve 7 which normally seats upon the upper surface of the head and closes the upper ends of the passages. The valve has the depending stem portion 8 which passes through 'a'central opening in the head and the lower end of the stem is flanged as shown at 9. A coiled spring 10 surrounds the stem 8 75 with its lower end engaging the flange 9 and its upper end received in a recess l1 formed in the lower end of the head 3. A valve 12 is adapted to normally close the passages 6 in the lower head 5, the valve seating on the upper surface of the head and closingthe upper ends of the passages. The valve 12 has the 'depending stem portion 13 which passes through a central opening in the head and the lower end of the stern is formed with the flange 14. A coiled spring 15 surrounds the stem 13 with its lower end received upon the flange 14 and its upper end received in the recess formed in the lower end of the head. Each of the valves 7 and 12 has a central opening ytherethrough and each of the stems 8 and 13 is hollow, the plunger rod 17 passing through the valves and stems as is quite clearly illustrated in Fig. 1 of the drawings.

Threaded on the upper head 3 is the sleeve 95 18 which forms a continuation of the barrel or tube 2 and the upper end of the sleeve is enlarged as shown at 19 for a purpose to be .laterl described. Arms 2O extend inwardly from the upper end of the sleeve 18 and are 100 Aeo formed on the inner ends with the ring 21 for a purpose to be later described.

Threaded onto the lower head 5 is a sleeve 22 which forms a continuation of the barrel or tube 2. The lower end of the sleeve 22 is curved inwardly as shown at 23. Slidably mounted in the lower end of the sleeve 22 is the sleeve 24 which has its upper end curved to form the flange 25, the downward movement of the sleeve 24 being limited by the inwardly curved end portion 23 of the sleeve 22. A packing ring 26 surrounds the sleeve 24 and is normally held in engagement with the under surface of the inturned portion 23 of the sleeve 22 by means of the nut 27.

An anchor sleeve 28 is secured to the lower end of the sleeve 24, the lower end of the sleeve 24 being exteriorly threaded while the upper end of the sleeve 28 is interiorly threaded.

Secured to the plunger rod 17, at a point between the upper head 3 and the lower head 5 is the plunger 29 having the passages 30 therethrough and the packing ring' 31 adapted to engage the inner wall of the barrel or tubing 2. A valve 32 normally closes the upper ends of the passage 30 and is held in its lowermost position by means of the coiled spring 33. A recess 34 is `ormed in the upper end of the plunger and receives the lower end of the coiled spring 35. Secured to the upper end of the plunger rod 17 is the coupling head 36 of usual construction. j A coiled spring 37 surrounds the plunger rod 17 adjacent its lower end, and is seated upon the nuts 38.

Slidahly mounted through the ring 21 at the upper end of the barrel or tube 2 is the sleeve 39 the lower end of which is reduced as shown at 40 and provided with the flange 41. A coiled spring 42 surrounds the plunger rod 17, just below the plungerrhead 36 and is adapted to engage the upper end of the sleeve 39 as quite clearly shown in Fig. 1 of the drawings. Connected to the sleeve 39, bv means of the links 43. are the segments 44 of a packing ring. When the sleeve 39 is in its lowermost position, as shown more particularly in Fig. 1 of the drawings. the segments ot the packing ring will tightly engage the inner wall of the casing 1 but when the sleeve 39 is raised, in a manner to be later described, the raising of the links 43 will cause the segments 44 to be drawn away from the wall of the casing and break the seal. The segments slide on the enlarged portion 19 of the sleeve 18.

The barrel or tube 2 is formed adjacent its upper end. just beneath the upper head 3, with a by-pass 45, said luy-pass being of a length equal to the length of the plunger or a little greater than said length. y

The plunger is also provided, above the valve 32, with the passages 46.

From the above it is thought that the detail construction of my pump will be clearly understood and I will now endeavor to more clearly set forth the operation. The barrel or tube 2, with the parts carried thereby, is adapted to be inserted into the casing 1 as a unitary structure. lVhen inserting .the packing ring 26, the segments 44 of the upper packing` will be so positioned as to allow ready movement of the unitary structure downwardly into the casing. lrVhen the anchor sleeve 28 engages the bottom' ot the well the pump plunger 17 will continue its downward movement to a certain extent and the spring 42 engaging the upper end ot the sleeve 39 will force said sleeve down wardly and position the links in a horizontal position to tightly engage the inner wall of the casing. When the anchor sleeve 28 engages the bottom of the well the barrel or tube 2 also continues its downward movement to a certain extent and the int-urned end 23 of the sleeve 22 forming the lower end of the barrel or tube will be forced into the upper end of the packing 26 and will torce said packing into tight engagement with the casing 1. Then thus positioned the upper and lower packings will engage the casing tightlv to prevent leak between the casing and the plunger barrel or tube. Vith the parts in this position the plunger rod may be operated to raise and lower the plunger 29. It will be understood that when the unitary structure is being inserted into the casing that the valves 7, 12 and 32 will be raised or opened to relieve pressure beneath the structure. With the structure within the well the raising and lowering ot the plunger raises the oil. As the plunger is raised the valve 12 will be opened bv suction and oil drawn through the passages 6 into the barrel or tube 2 beneath the plunger. Then the plunger is moved upwardly the valve 32 is closed and the oil above the plunger opens the valve 7 and allows the oil to pass through the passages 4. On the downward movement ot the plunger the upper and lower valves 7 and 12 will be closed and the oil above thc lower head 5 will pass through the passages 30 in the plunger. open the valve 32. and allow the oil to pass through the openingsl or passa ges 46 to a position above the plunger. Then it. is desired to remove the unitary structure from' the well this iuay he donc liv drawing up on the plunger coupling head 36 and in drawing the unitary structure from the well it will he desired to relieve all pressure above the valves. The raising of the plunger rod 17 brings the spring 37 into engagement with the flange 14 of the stein ot the valve 12 aud raises the valve. from its seat.. This allows the oil above the valve to pass through the passages 6 into the well. Upon raising the plunger rod 17 the plunger 29 will be raised to a position adjacent the by-pass 45 and oil above the plunger will pass through said bypass and beneath the plunger. As the all, plunger rod and engageable with the dependplunger is raised into the position just described the spring 35 will engage the liange 9 on the stem of the valve 7 and raise the valve 7 to allow oil above the valve 7 to pass throu h the passages 4. The raising of the valve engages the lower end of the sleeve 40 and raises said sleeve to draw the segments 44 inwardly to break the seal at the top. Ofr

course, as the plunger barrel or tube 2 is withdrawn from the casing the packing 26 will be released from its tight engagement withfthe casing. From the above it will be seen that I have provided a novel construction in which a unitary pump structure may be raise-d or lowered relative to the well casing, in which a secure seal is provided at both the-top and bottom, and in which pressure is relieved above the several valves and plunger when drawing the unitary structure from' the well. Having fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. A pump of the character described including a barrel having a recess formed therein to provide an interior bv-pass` heads secured within the barrel above and below the by-pass and having passages therein, valves for controlling the passages through the heads. a plunger operable in the barrel' between the heads. said plunger being adapted to be positioned adiacent the bypass for relieving pressure thereabove, and means Jfor opening the valves controlling the passages through the heads upon movement of the plunger.

2. A pump of the character described including a barrel having a liv-pass therein, upper and lower beads positioned in the barrel on opposite sides of the b v-pass, each of said heads having passages therein. valves for controlling the passages through the heads. a plunger rod slidable relative to the barrel, a plunger carried bv the plunger rod and operable in the barrel between the heads, said plunger having passages therethrough, a valve for controlling the passages through the plunger, the plunger being adapted to be positioned adjacent the by-pass for relieving pressure thereabove, means carried b v the plunger rod for opening tbe valve of the lower head, and means carried by the plunger for opening the valve of the upper head.

3. A pump of the character described ining portions of the head valves for operating said valves. Y

4. A pump of the character described including a barrel, upper and lower heads positioned in the barrel and having passages therethrough, a valve carried by each of the heads for controlling the passages therethrough, each of said valves having a depending portion, a plunger rod slidable relative to the heads, a plunger carried by the plunger rod and operable between the heads, means carried by the plunger and engageable with the depending portion of the upper head valve for operating the same, and means carried by the plunger rod and engageable with the depending portion of the lower head valve for operating the same.

5. A pump of the character described including a barrel, upper and lower heads positioned in the barrel and having passages therein, valves for controlling the passages through the heads, a plunger rod slidable relative to the heads, a plunger carried by the plunger rod and operable between the heads, and members carried by and movable with the plunger rod, said members being normally out of engagement with the valves but adapted to be engaged therewith and open the same upon upward movement of the rod.

6. A pump of the character described including' a barrel, upper and lower heads positioned in the barrel and having passages therein, valves for controlling the passa es -through the heads, a plunger rod slida le relative to the heads, a plunger carried by the plunger rod and operable between the heads, and yieldable members carried by and movable with the plunger rod, said yieldable members being normally out of engagement with the valves but adapted to be engaged therewith and open the same upon upwardfl movement of the rod.

In testimony whereof I hereunto aiix my signature.

WILLIAM D.l OGLETREE.

cluding a barrel, upper and lower heads Y positoned in the barrel and having passages therethrough, a valve carried by each of the heads for controlling the passages therethrough, each of said valves having a depending portion, a plunger rod slidable relative to the heads, a plunger carried by the plunger rod and operable between the heads, and means controlled by the movement of the 

